Related Experiment Videos
Erythema nodosum and kerion of the scalp
Abstract:
Three children had pustular patches develop over the occipital areas of the scalp. Colonies of Trichophyton mentagrophytes grew on cultures with Sabouraud's dextrose agar with antibiotics. After a week of topical treatment with 1:10,000 potassium permanganate solution and oral treatment with griseofulvin, typical nodules of erythema nodosum appeared over the shins, ranging in diameter from 1 to 4 cm. Nodules on the legs resolved spontaneously within 12 days in the three children. Erythema nodosum occurring in patients with kerion may be interpreted as individual allergic hypersensitivity reactions as a result of the immune host response to allergenic products from the primary site of infection. This possibly may cause immune complexes that precipitate erythema nodosum.
Insights
Scalp fungal infections (kerion) in children can trigger erythema nodosum, a skin reaction appearing on the shins. This immune response to fungal products may cause allergic hypersensitivity.
Area of Science:
- Dermatology
- Mycology
- Immunology
Background:
- Kerion, a severe form of scalp fungal infection, typically presents with boggy, pustular lesions.
- Pediatric fungal infections require prompt diagnosis and management to prevent complications.
Observation:
- Three children presented with pustular occipital scalp patches caused by Trichophyton mentagrophytes.
- Following treatment for kerion, all three children developed erythema nodosum on their shins.
Findings:
- The erythema nodosum lesions ranged from 1 to 4 cm in diameter and resolved spontaneously within 12 days.
- Fungal cultures confirmed Trichophyton mentagrophytes as the causative agent.
Implications:
- Erythema nodosum in kerion cases suggests a host hypersensitivity reaction to fungal antigens.
- This immune response may involve immune complex deposition, leading to erythema nodosum.